Question 2 - Flownet The following figure show a sheet pile wall for a temporary cut...
The following figure show a sheet pile wall for a temporary cut at a construction site. The soil has a permeability, k, of 10 m/s. IMPERVIOUS ROCK LAYER A. What is the direction of the water flow? Left to right? or Right to the Left? B. Construct the flow net. Sketch the figure on your anwer sheet then constret the flow net. C. Compute the amount of seepage, q, in terms of m/s. D. Estimate the pore water pressure at...
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[15) 3. Two lines of sheet pile walls are driven into a river bed to allow excavation of a trench. Water level in the trench is maintained at the bottiom of the excavation (level C-F) by pumping Elevations are as follows: Impervious layer (level E-G; datum): Oft Soil surface (level B-B') Water level & soil level in trench (C-F): 40t Water level in river (A-A'): 75 t Tip of...
The soil conditions adjacent to a sheet pile wall are given in the Figure 2 below, a surcharge pressure of 40 kN/m2 being carried on the surface behind the wall. Draw the active and passive lateral earth pressure diagrams; and determine the active and passive forces acting on 1m length of the wall. The properties of the clay layer: Cohesion: c 10 kN/m2 Shear resistance angle: #25° Unit weight: y-19.5 kN/m3 9-40 kN/m Clay Clay Figure 3 The following may...
*need the uplift force
Problem 5 Consider the flow net shown below. The sandy soil has an average saturated unit weight of 20 kN/m and permeability of 0.002 cm/s. Numbers provided are elevations from the interface with the impervious layer. The other "set" of numbers counts the number of head drops. (a) Compute the distribution of pore water pressure acting along the base of the concrete weir, and determine the vertical uplift force that the water pressure exerts on the...
QUESTION 10 What is the water pressure at C at the back side of the wall for the sheet pile case shown below? Sheet piling Back Front _WT. 2.50 m Datum B 12 4.00 m E D 1 Ysat 18.5 kN/m3 4.70 m 4.80 m G 10 5.98 39.24 58.66 QUESTION 11 What is the exit hydraulic gradient in the following flow net? Sheet piling Back A Front T 2.50 m W.T Datum B 12 4.00m E D Ysat 18.5...
GEOTECHNICAL AFTERNOON SAMPLE QUESTIONS Questions 50s-506: A reinforced concrote dam having a sheet-pile cutolf wall is to be uned to retai 12-foot-high wader. The dam is 120 fbet long-d be dimensions led the now net ne shown in figu爬below. The-soil has the following characteristic: Homework problem Cocfficient of permeability 0003 fpa (isotropie soil) Compute: (1) The quantity of seepage loss under the dam (cfs). (2) The pressure head at Point A, which is 2.0 feet above the impervious base. 12-...
9. Estimate the flow rate for the sheet pile shown below, with H1-15m, H2-5m, k- 3 x10-6 m/sec, and a homogeneous soil layer of 5m and a sheet pile embedment of a) lm, b) 2m and c) 3m. Use the given flow net and compare results with the approximate designs given in the sheet pile chart discussed in the lecture notes. Sheet pile Water level Water level Impervious
Sheet pile Draw a flow net for a single row of sheet piles driven into a permeable layer as shown in the figure, given the following: Hi H, H2-0.7 m; D1-10 m Calculate the seepage loss per meter length of the sheet pile (at right angles to the cross section shown) k6.5x 104em/see Impermeable layer
5 8 7 8 9 10 111 112 113 114 15 Q3b(i) Figure shows a flow net beneath an impervious concrete dam. The permeability of the soil foundation is 1.4 x10-6 m/s. The head loss between upstream and downstream is 6.8m. The water height (H1) is 13.4m. Unit weight of water is 9.81 kN/m3 Upstream H1 11.5 m Downstream T 9.0 m 17.0 m; datum impermeable stratum Determine the quantity of seepage in m/day, if the dam is 4 m...
5) (25 points) A sheet pile wall is constructed as shown in the figure. Groundwater m below the ground surface Soil properties for clay: c' Soil properties for sand:4, 10 kPa, φ,-26", and γ = 18 kN/㎡ 32°, and -20 kNm? a. 20 points) Plot active and passive lateral earth pressures on both si b. (5 points) Calculate the passive horizontal force acting on the wall. 20 kN/m2 clay sand 2 m wall